Volume 2 Issue 2
Jun.  2017
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Fabrication of highly water-repelling paper by surface coating with stearic acid modified calcium carbonate particles and reactive biopolymers

  • Corresponding author: Peng Lu, lupeng@gxu.edu.cn
  • Fund Project:

    Special acknowledge to the Scientific Research Fund of State Key Laboratory of Pulp and Paper Engineering (No. 201351), the Natural Science Foundation of Guangxi (No. 2015GXNSFBA139042), and Chinese Scholarship Council (CSC). This research was also supported by the Dean Project of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control (ZR201607 and ZR201607) and the Scientific Research Foundation of Guangxi University (No. XGZ160294), Nanning 530004, China.

  • Cellulose paper is the most attractive green packaging material due to its recyclability, renewability, sustainability and biodegradability. In some applications, paper with a high level of water resistance is desirable to meet specific requirements in modern packaging fields. This research aimed to develop a water-repelling paper with cost-effective and nontoxic materials. Commercial precipitated calcium carbonate (PCC) particles were modified by stearic acid (SA) and incorporated with soybean oil-based binder as a water repelling coating agent. The water-repelling efficiency of the coated paper was highly dependent on the ratio of SA/PCC as well as the binder content in the coating formula. PCC particles modified with 12wt% SA were efficient in increasing the water contact angle (WCA) of the coated paper to 146° at a coating weight of 5 g/m2. The binder for the coating was synthesized with acrylated epoxidized soybean oil (AESO) through Michael addition reaction. The triglyceride structure in the polymer chain imparted good bio-degradability to the binder polymer. It was found that surface modification of PCC with stearic acid played an important role in improving the WCA of paper. A super hydrophobic paper with a WCA of 162° was fabricated with a coating formula of 60% SA-modified PCC and 40 wt% AESO-binder.
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Fabrication of highly water-repelling paper by surface coating with stearic acid modified calcium carbonate particles and reactive biopolymers

    Corresponding author: Peng Lu, lupeng@gxu.edu.cn
  • a. Institute of Light Industry and Food Engineering & Guangxi Key Laboratory of Clean Pulp and Papermaking and Pollution Control, Guangxi University, Nanning, 530004, China;
  • b. Department of Chemical Engineering and Limerick Pulp & Paper Centre, University of New Brunswick, Fredericton, NB E3B 5A3, Canada;
  • c. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou, 510640, China
Fund Project:  Special acknowledge to the Scientific Research Fund of State Key Laboratory of Pulp and Paper Engineering (No. 201351), the Natural Science Foundation of Guangxi (No. 2015GXNSFBA139042), and Chinese Scholarship Council (CSC). This research was also supported by the Dean Project of Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control (ZR201607 and ZR201607) and the Scientific Research Foundation of Guangxi University (No. XGZ160294), Nanning 530004, China.

Abstract: Cellulose paper is the most attractive green packaging material due to its recyclability, renewability, sustainability and biodegradability. In some applications, paper with a high level of water resistance is desirable to meet specific requirements in modern packaging fields. This research aimed to develop a water-repelling paper with cost-effective and nontoxic materials. Commercial precipitated calcium carbonate (PCC) particles were modified by stearic acid (SA) and incorporated with soybean oil-based binder as a water repelling coating agent. The water-repelling efficiency of the coated paper was highly dependent on the ratio of SA/PCC as well as the binder content in the coating formula. PCC particles modified with 12wt% SA were efficient in increasing the water contact angle (WCA) of the coated paper to 146° at a coating weight of 5 g/m2. The binder for the coating was synthesized with acrylated epoxidized soybean oil (AESO) through Michael addition reaction. The triglyceride structure in the polymer chain imparted good bio-degradability to the binder polymer. It was found that surface modification of PCC with stearic acid played an important role in improving the WCA of paper. A super hydrophobic paper with a WCA of 162° was fabricated with a coating formula of 60% SA-modified PCC and 40 wt% AESO-binder.

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